190=4b^2-6

Solution for 190=4b^2-6 equation:

190=4b^2-6

We move all terms to the left:

190-(4b^2-6)=0

We get rid of parentheses

-4b^2+6+190=0

We add all the numbers together, and all the variables

-4b^2+196=0

a = -4; b = 0; c = +196;
Δ = b2-4ac
Δ = 02-4·(-4)·196
Δ = 3136
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{3136}=56$
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-56}{2*-4}=\frac{-56}{-8}
=+7
$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+56}{2*-4}=\frac{56}{-8}
=-7
$